Journal
APPLIED SURFACE SCIENCE
Volume 331, Issue -, Pages 170-178Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2014.12.141
Keywords
Ionic liquids; BiOBr; Yttrium; Visible-light photocatalytic activity; Ciprofloxacin
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Funding
- National Natural Science Foundation of China [21206060, 21471069, 21177050]
- China Postdoctoral Science Foundation [2013T60506]
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Yttrium (Y)-doped BiOBr with different Y doping concentrations has been synthesized via solvothermal method in the presence of reactable ionic liquid 1-hexadecyl-3-methylimidazolium bromide([C(16)mim]Br). Their structures, morphologies and optical properties were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and UV-vis diffuse reflectance spectroscopy (DRS). The photocatalytic activities of the yttrium doped BiOBr samples were evaluated by the degradation of ciprofloxacin (CIP) and rhodamine B (RhB) under visible-light irradiation. The yttrium doped BiOBr exhibited enhanced photocatalytic activity for the degradation of the two types of pollutants, and the 5wt%Y-doped BiOBr showed the highest photocatalytic activity. The enhanced photocatalytic performance could be attributed to the reduced band gap and improved separation of electron-hole pairs. (C) 2014 Elsevier B.V. All rights reserved.
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